Title: Barium Sulfide
CAS Registry Number: 21109-95-5
Molecular Formula: BaS
Molecular Weight: 169.39
Percent Composition: Ba 81.07%, S 18.93%
Literature References: The commercial article contains 80-90% BaS. Prepn: Ehrlich in Handbook of Preparative Inorganic Chemistry vol. 1, G. Brauer, Ed. (Academic Press, New York, 2nd ed., 1963) p 938.
Properties: Heavy, grayish-white or pale yellow powder. d 4.36. mp >2000°. Poisonous! Oxidizes in dry air; slowly dec in damp air into carbonate, etc., with evolution of H2S. Slightly sol in cold, more in hot water; sol in NH4Cl soln; decomposed by acids, even CO2, forming H2S. Keep in well-closed containers.
Melting point: mp >2000°
Density: d 4.36
Use: As depilatory; in luminous paints; manuf lithopone; vulcanizing rubber, generating H2S.